Apple App Store - Install apps on your iDevice via the App Store.
iNoJB - iNoJB, formerly iNoCydia, is an amazing Cydia alternative requiring no jailbreak!
Cydia - An alternative app store for jailbroken devices.
UserTrue - Free peer to peer app reviews. Give a review, get a review for free.
Sileo - An APT package manager for jailbroken iDevices.
BuildStore - Safe and trustworthy alternative app store for iOS